Chain post binder



June 28, 1932. J, H. DAvxsoN CHAIN POST BINDER Filed March 5l, 1930known in the art. Each chain post carries a Patented June 28, 1932 v 'lUNITED sTAJlEs PATE JAMES H. DAVISON, 0F CHICAGO, ILLINOIS, ASSIGNOR T0-J'ONES COMPANY, OF CHICAGO, ILLINOIS, A CORPORAT'ION'OF MASSACHUSETTSGHAIN PosrBINDER Appncation mea March a1, 1930. seal No. 440,202.

heads 7 extend as shown more clearly in Figures2 and 3. The flange 8oneach screw however Ais larger than said aperture and cannot passtherethrough p and is forced to bear against the top of the loose sheetsand impart a compression thereto. p

The aforementioned latching slide 11 is mountedin the upper clampingmember and is provided with an arcuate notch at one end for engaging thegroove 10 in one terminal head. This tubular slide l1 is also providedwith a slot 11a for receiving the other post, and one end of this slot11a is designed for engaging the groove of the adjacent post.

The tubular slide is adapted to be actuated from one side of the binderand to this end, the unnotched terminal of the tubular slide Thisinvention relates to a chain post binder and concerns itself primarilywith terminal heads for the ends of the chain that bear directly uponthe loose sheets and provide a better compression and that eXtend intoone of the clamping members which is provided with means for lockingsaid terminal heads thereto.

The invention comprises the novel structure and combination of partshereinafter described and more particularly pointed out and defined inthe appended claims.

In the accompanying drawing which illustrates a preferred form of thisinvention and in which similar reference numerals refer to similarfeatures in the different views:

Figure 1 is a perspective view of a chain post binder involving thisinvention.

Figure 2 is an enlarged transverse sectional view through the bindertaken through the two clamping members upon the line II-II of Figure 1looking in the direction of the arrows.

Figure 3 is an enlarged fragmentary sectional view taken upon the lineIII-III of Figure 2 with the slide omitted.

Figure 4; is an elevational view of one of the terminal heads for thechain post.

The illustrated binder consists of a pair ofV cover members 1 whichrespectively carry the clamping members 2 and 3. A screw rod 4 havingright and left hand threads is secured in the clamping member 3 forrotation and this screw rod carries a pair of nuts 5 to which the chainposts 6 are attached as is well which a screw 15 is rotatably anchored.The screw 15 is threaded in one of the end plugs 16 that close the endsof the clamping member and is provided with a polygonal terminal 17 forreceiving a key whereby the same may be rotated.

In its assembled relation, the clamping members are held together by thechain post and the slide 11 which engages the grooves 10 in the terminalheads of the chain posts. When itis desired to lengthen the chain, theterminal heads may' be unscrewed and sectional posts may be added inorder to increase the capacity of the binder. In order to do this, thelatching slide l1 must first be actuated to release the terminal heads 7from engagement therewith whereupon the upper clamping member 2 may bedisengaged from the heads 7.

It will be noted that the terminal heads 7 are concealed in the upperbinder head 2 which does not apply any pressure to the loose sheetswhich are held in compressed relation by the pressure of the flanges 8thereon.

I am aware that many changes may be made and numerous details ofconstruction may be varied through a wide range without departing fromthe principles of this invention, and I, therefore, do not purposelimitin the patent granted hereon otherwise than necessitated by theprior art.

terminal head 7 which is provided with a flange 8 adapted to engage theloose sheets 9 and compress the same as shown in Figure 2. Above theHange 8, each terminal head is provided with a groove 10 adapted forreceiving a tubular slide latch 11 as will later more fully appear.These heads 7 are provided with threaded portions 12 which are adaptedfor being screwed into suitable threaded sockets in the -end plates 13of the chain so that the same may be removed and extension-post sectionsadded. The upper clamping members 2 is provided with suitable aperturesthrough which the upper portions of the terminal vis provided with anupstanding lug 14 in Y I claim as my invention:

1. In a chain post binder, a hollow clamping member, take-up mechanismin said clamping member, chain posts connected to v5 said take-upmechanism, terminal heads on said chain posts having flanges forcompressing the loose sheets, a second hollow clampinv member havingapertures for receivingv sai heads, said heads having grooves and aslide mounted in said second clamping member for engaging said groovesfor locking said terminal heads to said second clamping member.

2. In a chain post binder, a pair ofhollow opposed clamping members,chain posts connecting said clamping members, a terminal head oneachchain posthaving an enlarged flange adapted for bearing upon saidsheets', and saidheads extending into one clamping 2o t member and meansin saidy clamping member for locking said heads thereto.

3. In a chain post binder, a pair of clamping members, flexible postsconnecting said clamping members, said posts having lianged headsadapted for bearing upon the loose sheets and means for lookin@r saidheads in the adjacent clamping memer.

In testimony whereoli` I have hereunto subscribed my name at Chicago,Cook County,

: Illinois.

JAMES H. DAVISON.

